Essays on Induction Motor

Three phase induction motors

Introduction The three-phase induction machine is the most widely used among the rotating machines. An induction machine offers an almost constant speed within its normal operating range when operated off a constant-voltage, constant-frequency, and with the electric power source. The cost of purchasing these machines is very low, and they require little maintenance. However, speed control is difficult and very expensive. Therefore, the rotor current of the three phase induction motors is not induced by electrical connections, but rather the rotation of magnetic field.

Squirrel Cage Rotor construction

The rotor type of the motor is made up of a laminated core which is ...

The viability of all the concepts that were brainstormed were all checked out and all the differences and advantages were put into consideration. The environment and the work suitability was checked together with the required specifications that each concept brought into place. Decision matrices were used to outline the suitability of the selected concept. Notably, concept B was the most preferred. Some of its advantages that made it a better choice over the other concepts was due to its security payload, speed indicators and stability. Therefore, concept B is expected to show better results in the Development of Product ...

Biography

Nikola Tesla was born on July 10, 1856 in Smiljan, Croatia, as a fourth child to parents Milutin Tesla and Djuka Mandic. His father was a Serbian Orthodox Priest while his mother was an inventor of household appliances. Although pressured by his father to join the priesthood, Tesla was mostly interested in sciences. His calling was towards electrical engineering, for which he studied at the Polytechnic Institute in Graz, Austria, the Realschule, Karlstadt and the University of Prague. Tesla moved to Budapest and began his career working with a telephone company in 1881 and it was during this time ...

Objective

1. Introduction An induction motor is an AC motor, which the electric current in the rotor produces the torque. An induction motor requires commutation. All parts of the energy is transferred from stator to rotor. Three phase squirrel cage induction motor is widely used in the industrial application. In induction motor, the AC power creates the rotating magnetic field that rotates the rotor. This rotating magnetic field produces the opposing current in the rotor. This creates the magnetic field in the rotor, which opposes the rotating magnetic field. The rotor will start to rotate in the direction of ...

Nikola Tesla, in the year 1987 filed several series of patents that touched on everything that was needed to generate electricity by use of alternating current (AC). Tesla pointed out all the inefficiencies of direct current (DC) electrical power house by Edison. The secret to pinpointing this lay in the innovation of alternative current. According to him, alternative current provided cyclic energies and could send electrical energy first one way along distribution lines using multiple waves by use of polyphase principle. Prior to his inventing of AC could be converted into one point direction using inefficient device referred as ...